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To explore the therapeutic effect of hydroxysafflor yellow A (HSYA) on acute exacerbation of chronic obstructive pulmonary disease (AECOPD) mice and its mechanism of action.
Mice were randomly divided into control group, model group and experimental -L, -M, -H groups, with 20 mice per group. The control group was raised normally, and the other groups were exposed to cigarette smoke (CS) and non-typeable Haemophilus influenzae (NTHi) infection to establish an AECOPD mouse model. Starting from the 12th week of CS exposure, experimental -L, -M, -H groups were administered 25, 50 and 100 mg·kg-1·d-1 HSYA by gavage, and control and model groups were given 0.9% NaCl by gavage. Five groups were administered once a day for 2 weeks. The functional residual capacity (FRC) of the mice was measured using the Buxco lung function test system. The percentage of neutrophils in bronchoalveolar lavage fluid (BALF) was measured using flow cytometry. The expression levels of phosphatidylinositol-3-kinase (PI3K) and protein kinase B (Akt) in lung tissues were detected by Western blot.
The FRC of experimental -M, -H groups, model group and control group were (0.31±0.01), (0.27±0.01), (0.37±0.02) and (0.25±0.01) L; the neutrophil percentages were (37.96±2.88)%, (28.41±1.64)%, (60.27±2.12)% and (11.33±0.31)%; the phosphorylated PI3K/PI3K ratios were 1.59±0.08, 1.30±0.06, 2.28±0.08 and 1.00±0.06; the phosphorylated Akt/Akt ratios were 1.33±0.11, 1.15±0.03, 1.76±0.11 and 1.00±0.06, respectively. Compared with model group, the differences of above indexes in experimental -M, -H groups were statistically significant (all P<0.05).
HSYA may reduce neutrophil activity by inhibiting the PI3K/Akt pathway, thereby inhibiting inflammatory responses and alleviating lung injury.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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